Preparation as well as adsorption and catalytic degradation application of high-strength three-dimensional graphene composite adsorbent

An adsorbent, graphene technology, applied in the field of chemical materials, can solve the problems of limited adsorption capacity of PPCPs, difficult separation of powder materials, poor recycling effect, etc., to achieve high mechanical strength, strong hydrophilicity, and good catalytic performance. Effect

Active Publication Date: 2018-06-01
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned adsorption materials have problems such as limited adsorption capacity for PPCPs, difficulty in separating powdery materials from water, difficulty in regeneration, and poor recycling effect.
Three-dimensional graphene material has been proved to be a good adsorption material, but its strength is not enough, and the structure is easily destroyed during the adsorption process
However, the current conventional adsorption materials cannot meet the above requirements at the same time.

Method used

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  • Preparation as well as adsorption and catalytic degradation application of high-strength three-dimensional graphene composite adsorbent
  • Preparation as well as adsorption and catalytic degradation application of high-strength three-dimensional graphene composite adsorbent
  • Preparation as well as adsorption and catalytic degradation application of high-strength three-dimensional graphene composite adsorbent

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Comparison scheme
Effect test

Embodiment 1

[0071] Utilize the method of the embodiment of the present invention to prepare the adsorbent, and carry out adsorption and regeneration detection on the adsorbent, specifically as follows:

[0072] 1. Preparation of adsorbent

[0073] (1) Mix 2 mg / mL graphene oxide dispersion with 0.025 mol / L ferrous sulfate aqueous solution at a volume ratio of 1:1, sonicate for 5 minutes, then adjust the pH of the solution to 10 with ammonia water, after 10 minutes of sonication , heated at 90 degrees Celsius for 12 hours to obtain a three-dimensional graphene / ferric oxide composite.

[0074] (2) The three-dimensional graphene / ferric oxide composite obtained in step (1) is repeatedly washed in high-purity water until the washing water is neutral.

[0075] (3) The three-dimensional graphene / ferric oxide composite after cleaning that step (2) obtains is heated at 50 degrees centigrade for 1 hour to obtain a high-strength adsorbent, and the scanning electron microscope detects the adsorbent, ...

Embodiment 2

[0082] Utilize the method of the embodiment of the present invention to prepare the adsorbent, and carry out adsorption and regeneration detection on the adsorbent, specifically as follows:

[0083] 1. Preparation of adsorbent

[0084] (1) Mix 2 mg / mL graphene oxide dispersion with 0.05 mol / L ferrous sulfate aqueous solution at a volume ratio of 1:1, sonicate for 5 minutes, then adjust the pH of the solution to 11 with ammonia water, and after 10 minutes of sonication , heated at 80 degrees Celsius for 6 hours to obtain a three-dimensional graphene / ferric oxide composite.

[0085] (2) Repeatedly washing the three-dimensional graphene / ferric oxide composite obtained in step (1) in high-purity water until the washing water is neutral.

[0086] (3) heating the three-dimensional graphene / ferric oxide composite obtained in step (2) at 40 degrees Celsius for 1.5 hours to obtain a high-strength adsorbent, which has good hydrophilicity and significantly improved mechanical properties...

Embodiment 3

[0093] 1. Preparation of adsorbent

[0094] (1) Mix 2 mg / mL graphene oxide dispersion with 0.1 mol / L ferrous sulfate aqueous solution at a volume ratio of 1:1, sonicate for 5 minutes, then adjust the pH of the solution to 10 with ammonia water, after 10 minutes of sonication , heated at 70 degrees Celsius for 8 hours to obtain a three-dimensional graphene / ferric oxide composite.

[0095] (2) The three-dimensional graphene / ferric oxide composite obtained in step (1) is repeatedly washed in high-purity water until the washing water is neutral.

[0096] (3) heating the three-dimensional graphene / ferric oxide composite obtained in step (2) at 30 degrees Celsius for 2 hours to obtain a high-strength adsorbent, which has good hydrophilicity and significantly improved mechanical properties.

[0097] 2. Adsorption effect experiment and results

[0098] 5 mg of the prepared adsorbent was put into 0.2 mmol / L 15 mL PPCPs solution, and shaken at 150 rpm for 72 hours. The concentration ...

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Abstract

The invention discloses an adsorbent as well as preparation, regeneration method and application thereof. The method for preparing the adsorbent comprises the following steps: mixing 1-3g / L graphene oxide dispersion liquid and 0.025-0.1mol / L ferrous sulfate solution and performing ultrasonic treatment to obtain a mixed solution; adjusting the pH value of the mixed solution to alkalinity, and performing co-precipitation treatment to obtain a three-dimensional graphene compound loaded with ferrosoferric oxide; heating the three-dimensional graphene compound loaded with ferrosoferric oxide to obtain the adsorbent with enhanced mechanical strength. The adsorbent prepared by the method has the advantages of strong adsorbability on such pollutants as PPCPs, high mechanical strength, easiness inregeneration and good catalytic performance.

Description

technical field [0001] The present invention relates to the field of chemical materials, in particular to the preparation of a high-strength three-dimensional graphene composite adsorbent and its application in adsorption and catalytic degradation, more specifically to a method for preparing an adsorbent, an adsorbent, a regeneration method for an inactivated adsorbent and Use of an adsorbent for the adsorption of a hydrophilic substance. Background technique [0002] Pharmaceuticals and personal care products (PPCPs) refer to a range of chemicals including prescription and over-the-counter drugs, diagnostics, fragrances, sunscreens and other household chemicals. As emerging pollutants, PPCPs have attracted much attention in recent years. So far, more than 100 kinds of PPCPs have been detected in the water environment. At the same time, toxicological studies have confirmed that PPCPs may have toxic effects on some aquatic organisms and even humans, which has aroused widespr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01J20/34B01J23/745
CPCB01J20/06B01J20/20B01J20/3416B01J20/3475B01J23/745B01J35/613B01J35/633B01J35/647
Inventor 邓述波单丹娜余刚王斌黄俊王玉珏
Owner TSINGHUA UNIV
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